Drain-valve.



1;. s. STOTTS.

DRAIN VALVE. APPLIQATION FILED APR. 15, 1910. 996,600. Patented June 27, 1911.

, I z slums-SHEET 1.

,f'r f.

ammo/144104 fie, 5.5mm

E. s STOTTS.

DRAIN VALVE. APP LIQATION FILED APR. 15, 1910.

Patented June 27, 1911.

2 BHEETS-BHEET 2.

1 fgwumtom oration.

ELZA s. sror'rs, or MARION, Iowa.

DRAIN -VALVE.

sea.

Specification of Letters Patent.

latonted June 2'7, limit.

Application filed April 15, 1910. Serial No. 555,673.

C'b all whom it may concern:

Be it known that I, ELZA S. Sro'r'rs, a citizen of the United States, residing at Marion, in the county of Linn and State of Iowa, have invented certain new and useful Improvements in Drain-Valves; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in drain valves for stand pipes, heating systems and the like.

The object of this invention is to provide an automatic bleed for steam pipes or the like when not in use so as to prevent freezing.

Other objects will be apparent from the following specification and drawings thereof in which Figure 1 is a sectional view of the coupling of two drain pipes showing one valve in section and the other in elevation. Fig. 2 is a perspective view of a spider used in the valve. Fig. 3 is a plan of a retaining ring as used in the valve. Fig. 3 is a sectional view of Fig. 3. Fig. 4 is a plan of the strainer used in conjl-lnction with the retaining ring. Fig. 5 is a bottom plan of the valve. Fig. 6 is a perspective view of a modified form of a spider as used to retain the spring. Fig. 7 is an elevational view o'l Fig. 6 showing the spring in section. Fig. 8 is a view of a modified form of valve. Fig. 9 is a view of another modification ot the valve. Fig. 10 is a sectional view of aniodilied form' of valve seat showing the spring retaining stud integral with said seat. Fig. 1.0 is a plan of the modified form of valve seat as shown in Fig. 10. Fig. 11 is a view of a modified form of valve showing means of inserting the valve from the outside. Fig. 11 is a modified form of Fig. 11 showing studs instead of slots in the valve seat.

Referring to the drawings, there are shown two couplers 1 and 2 having the usual train pipes 3 and clamps 4 assuring positive connections, it. being immaterial how said couplings are held together but I have shown such a means as the lugs'and link 5. The valve casing as indicated at 6 is inserted in a tap in the couplings and is so arranged as to collect any condensate Within the cas ng. Said casing is drilled or bored as at 7 to four diameters forming three shoulders against which bear the spider 8, the. valve 9 and the aineter of the retaining .rfng 10. The spider has an upstanding pin or lug-l1 which serves as a guide for the spring 12, said spring being in con'ipression between the spider 8 and the bottom of a recess l3 formed in the valve 9, the valve having the usual tapering walls which seat against the. shoulder intended to receive it. The valve is also recessed as at 14 to receive the lower end of a bolt 15, said bolt serving as a guide to cause the proper seating of the valve.

The retaining ring 10 is peripherally threaded and inserted into the greatest divasing (3. The upper face of said ring is recessed for the reception of a strainer 16, said strainer havingsniall perforations preventing any foreign substance entering and making the valve inoperative, the lower face of said ring being recessed to receive the top of the valve 9 but of a slightly larger dian'ieter than the valve. To prevent the valve rising and closing the openlugs 17 in said retaining ring a boss 18 is left on the lower permitting a circulating space whereby anv condensate within the tubes may be bled therefrom. The bolt passes through an opening in the strainer lt' aud the threaded opening in the retaining ring 10 and extends downwardly into the recess 14, in the valve 9.

The device as shown in Fig. l and Fig. "l of the drawings permits the spring 12 to be adjusted so as to reduce or increase. the coinprcssion as desired and consists of the usual spider 20 having a stud 21 extending therefrom, the stud 21 being drilled and internally threaded for the reception of a screw 22 which screw carries a swivel member 23, which nuunliier has a body portion which holds and guides the spring and a flange which limits the expansion oi? d spring.

As shown in Figs. 8 and f) the valve 9 has a stem 24- extcnding downwardlv throngs the recess 25, said stein being in I i the valve and in Fig. 9 I show standing Iron] the valve.

Figs. 10 and 10 disclose a valve casing having the spider integral therewith, the bore being sufiicicntly deep to leave a 26 which has a pluralitv of smaller openings 27 and a stud 28 to hold the spring.

' In Figs. 11 and ll arrangement is provided permitting tlie alteration of the sev-- eral parts without removing the casing from the coupling, the casing32 being drilled to several diameters forming several shoulders face of said ring, thereby pal as inthe other form, the valve having a fluted stem 33 extending upwardly into the smallest of the bores of the casing, the flutis'held in the recess 40 formed in the lower end of th'e valve 31, the outer end of the ring34 being headed and notched to permit adjustment. The wall of the casing 32'is recessed as at 41 in Fig. 11 or is provided with lugs 42 as shown-in Fig. 11 permitting adjusti'nent as by a Wrench. The casing (3 as shown in Fig. 1 has its outer portion (3 reduced and arranged forthe reception of a wrench or the like.

The operation of the valve is as follows: Assuming the pressure within and without as that of the atmosphere, the valves will be shown in the drawing and any water or accumulation of oil or the like will bleed from the pipes, the spring having been set at a predetern'iined compression, and assum- -ing that the pressure is applied, the pressure tends to seek the course of theleast resistance soten ds to pass through the valves carrying any water therewith. As soon as the pressure becomes greater than that of the spring" the valves willseat and close the path through thevalve casing and will remain so as long as pressure is on. When the pressure is reduced the valves-open and bleed all condensate from thepipe, makin it impossible for the Water to freeze an cause the delay of time to thaw them.

1. In a valve, a casing provided with a central bore, a valve member proper arranged to operate within the casing, an annular member having threaded connection with the'bore of the casing, a spider arranged within the annular member, an

apertured plate arranged adjacent to the spider, and an annular member constituting" a part of the spider and arranged to space the valve member from the spider.

2. In a valve, a casing provid d central bore, a valve member arranged to operate in the casing, said valve member having a central longitudinal bore closed at one end, a stationary member within the bore of the casing, a lug projecting friaan the stationary member and a springengaging said member and projecting into the bore of the valve member whereby said spring is protected by the body portion of the valve member surrounding the .spring.

In testimony whereof I aflix my signature in presence of two Witnesses.

ELZA S. STOTTS. Witnesses R. A. STREETER, L. O. DICKEY. 

